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Username Post: recirc position still turns on a/c even when a/c button light is off        (Topic#359065)
barking spider 
Newbie
Posts: 4

Loc: Phoenix
Reg: 04-26-12
12-07-19 02:19 PM - Post#2781671    

Trying to get heat but recirc position still turns on a/c even when a/c button light is off. Is this normal? Or is there a fix? Single zone. 2000 Silverado LS



 
CowboyTrukr 
"8th Year" Silver Supporting Member
Posts: 4320
CowboyTrukr
Loc: Salt Lake City
Reg: 06-20-09
12-07-19 04:47 PM - Post#2781679    
    In response to barking spider

It is if you have it on defrost. The A/C acts as a dehumidifier.

Greg

'95 K1500 Z71 EC Short Step 5.7L+0.040/NV3500
'00 Explorer XLT 4.0 V6 Auto
'94 K2500 5.7 NV4500 ECLB - SOLD
‘87 GMC S15 SCLB 4.3 Auto - SOLD

"The only thing necessary for evil to triumph is for good men to do nothing" Sir Edmund Burke


 
rockfangd 
"6th Year" Gold Supporting Member
Posts: 2846
rockfangd
Age: 33
Loc: Utica ny
Reg: 04-13-10
12-08-19 08:40 AM - Post#2781703    
    In response to CowboyTrukr

Exactly.
If this is occurring while in DEF, DEF/FLOOR it is normal.
If it is not then I suspect bad controls

Old School GM fan FOREVER


 
barking spider 
Newbie
Posts: 4

Loc: Phoenix
Reg: 04-26-12
12-16-19 10:07 PM - Post#2782310    
    In response to rockfangd

It is not in defrost when this happens. What part of the controls would be bad and in need of repair/replacement?



 
rockfangd 
"6th Year" Gold Supporting Member
Posts: 2846
rockfangd
Age: 33
Loc: Utica ny
Reg: 04-13-10
12-17-19 05:52 PM - Post#2782360    
    In response to barking spider

From my experience the dash controls are very common.
That is the main controls for the climate control

Old School GM fan FOREVER


 
tommy49 
"5th Year" Silver Supporting Member
Posts: 2776
tommy49
Loc: Kaleva, Michigan
Reg: 09-28-12
12-20-19 02:55 PM - Post#2782568    
    In response to barking spider

Sounds like what I had happen.I found this on another site:

A re-calibration may fix you up. Try disconnecting the battery for a few minutes. Reconnect it. Or remove the HVAC/ECAS fuse for a minimum of 10 seconds.

Re-install the HVAC/ECAS fuse.

Then turn the key to the on position, but
don't start. Don't touch the HVAC controls. Let them do whatever that
want to do. Air flow may change outlet points during this time. Wait
about 1 minute. Turn key off. Opening and closing the door can
make a difference as the vehicle controls see this as "cycle"
completion. Next start the vehicle and drive it a short distance and see
how it performs. You may indeed need to replace an actuator.

Tommy

49 Deluxe Sport Coupe, 4.8/4L60E swap in progress, Blazer rear axle, 4 wheel power disc brakes.

https://www.flickr.com/photos/tommyfortynine /album...




 
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